X : 23 = 45
Tính :
45 x 32 + 45 x 23
45 : 32 + 45 : 23
43 x 33 + 43 x 22 + 43
45 x 32 + 45 x 23
= 45 x ( 32 + 23 )
= 45 x 55
= 2475
45 : 32 + 45 : 23
= 1,40625 + 1,9566521739
= 3,362771739
43 x 33 + 43 x 22 + 43
= 43 x ( 33 + 22 + 1 )
= 43 x 56
= 2408
45 x 32 + 45 x 23
= 45 x ( 32 + 23 )
= 45 x 55
= 2475
45 : 32 + 45 : 23
= 1,40625 + 1,9566521739
= 3,362771739
43 x 33 + 43 x 22 + 43
= 43 x ( 33 + 22 + 1 )
= 43 x 56
= 2408
45 x 32 + 45 x 23
= 45 x ( 32 + 23 )
= 45 x 55
= 2475
45 : 32 + 45 : 23
= 1,40625 + 1,9566521739
= 3,362771739
43 x 33 + 43 x 22 + 43
= 43 x ( 33 + 22 + 1 )
= 43
k mk nha mai đổi tk bn tk mk câu này
Tìm x :
x - 23 = 45
x + 23 = 45
Ta có : x - 23 = 45
=> x = 45 + 23
=> x = 68
x + 23 = 45
=> x = 45 - 23
=> x = 22
Tính nhanh : 23 x 45 + 23 x 78 + 23 x 12 = ?
23 x 45 + 23 x 78 + 23 x 12
= 23 x ( 45 + 78 + 12)
= 23 x 135
=3105
= 23 x ( 45 + 78 + 12 )
= 23 x 135
= 3105
Ai tk mình thì mình tk lại
mik giúp bạn thì bạn giải giúp mik nha
23*45+23*78+23*12
=23*(45+78+12)
=23*135
=3105
Tính nhanh :
23 x 45 + 46 x 23 + 23 x 8 + 23
23 x 45 + 46 x 23 + 23 x 8 + 23
= 23 x 45 + 46 x 23 + 23 x 8 + 23 x 1
= 23 x (45 + 46 + 8 + 1)
= 23 x 100
= 2300
23x45+46x23+23x8+23=23x(45+46+8+1)=23x100=2300 k va kb voiminh nhe!
Tính nhanh: 23 x 45 x ( 45 x 24 - 69 ) x 67
\(23\times45\times\left(45\times24-69\right)\times67\)
\(=23\times45\times\left(1080-69\right)\times67\)
\(=23\times45\times1011\times67\)
\(=1035\times1011\times67\)
\(=1046385\times67\)
\(=70107795\)
Tìm x
a) x + 1 2 = − 4 5
b) − 3 4 − x = 2 3
c) 2 3 5 + − 3 5 : x = − 2 3
a ) x = − 4 5 − 1 2 ⇔ x = − 13 10 b ) x = − 3 4 − 2 3 ⇔ x = − 17 12 c ) − 3 5 : x = − 2 3 − 2 3 5 ⇔ − 3 5 : x = − 49 15 ⇔ x = − 3 5 : − 49 15 ⇔ x = 9 49
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(x -45).27=0
23.(42-x)=23
(x -45).27=0 23.(42-x)=23
(x-45) =0:27 42-x =23:23
(x-45) =0 42-x=1
x =0+45 x=42-1
x = 45 x=41
( x - 45 ) . 27 = 0
( x - 45 ) = 0 : 27
x - 45 = 0
x = 0 + 45
x = 45
23 . ( 42 - x ) = 23
( 42 - x ) = 23 : 23
42 - x = 1
x = 42 - 1
x = 41
(x -45).27=0
23.(42-x)=23
( x - 45 ) . 27 = 0
( x - 45 ) = 0 : 27
x - 45 = 0
x = 0 + 45
x = 45
23 . ( 42 - x ) = 23
( 42 - x ) = 23 : 23
42 - x = 1
x = 42 - 1
x = 41
1) Tìm x :
x + 125 - 45 + ( 12 + 23 ) = 155
x * 12 = ( 45 + 45 )
a) x + 125 - 45 + (12+23) = 40
=> x + 125 - 45 + 35 = 40
=> x + 115 = 40
=> x = 40 - 115
=> x = -75
b) x * 12 = (45 + 45)
=> x * 12 = 90
=> x = 90 : 12
=> x = 7,5
x + 125 - 45 + ( 12 + 23 ) = 40
=> x + 125 +( -45) + 35 = 40
=> x + 80 +35 = 40
=> x + 115 = 40
=> x = -75
x * 12 = ( 45 + 45 )
=> x * 12 = 90
=> x = 90 : 12
=> x = 15/2 = 7.5
a) x + 125 - 45 + (12 + 23) = 40
x + 125 - 45 + 35 = 40
x = 40 - 35 + 45 - 125
x = - 65
b) x * 12 = 45 + 45
x * 12 = 90
x = 90 : 12
x = 7,5
Tính
a , 2 3 + 3 4 = b , 2 3 - 3 8 = c , 3 7 x 4 5 = d , 2 5 : 2 3 =
a)(x-45)*27=0
b)23*(42-x)=23
x-45=0/27=0
x=0+45=45
b)42-x=23/23=1
x=42-1=41
k nh